1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/*
Unix SMB/CIFS implementation.
Database interface wrapper
Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2006
Major code contributions from Aleksey Fedoseev (fedoseev@ru.ibm.com)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "dbwrap.h"
#ifdef CLUSTER_SUPPORT
#include "ctdb_private.h"
#endif
/*
* Fall back using fetch_locked if no genuine fetch operation is provided
*/
static int dbwrap_fallback_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
TDB_DATA key, TDB_DATA *data)
{
struct db_record *rec;
if (!(rec = db->fetch_locked(db, mem_ctx, key))) {
return -1;
}
data->dsize = rec->value.dsize;
data->dptr = talloc_move(mem_ctx, &rec->value.dptr);
TALLOC_FREE(rec);
return 0;
}
/*
* Fall back using fetch if no genuine parse operation is provided
*/
static int dbwrap_fallback_parse_record(struct db_context *db, TDB_DATA key,
int (*parser)(TDB_DATA key,
TDB_DATA data,
void *private_data),
void *private_data)
{
TDB_DATA data;
int res;
res = db->fetch(db, talloc_tos(), key, &data);
if (res != 0) {
return res;
}
res = parser(key, data, private_data);
TALLOC_FREE(data.dptr);
return res;
}
bool db_is_local(const char *name)
{
#ifdef CLUSTER_SUPPORT
const char *sockname = lp_ctdbd_socket();
if(!sockname || !*sockname) {
sockname = CTDB_PATH;
}
if (lp_clustering() && socket_exist(sockname)) {
const char *partname;
/* ctdb only wants the file part of the name */
partname = strrchr(name, '/');
if (partname) {
partname++;
} else {
partname = name;
}
/* allow ctdb for individual databases to be disabled */
if (lp_parm_bool(-1, "ctdb", partname, True)) {
return false;
}
}
#endif
return true;
}
/**
* open a database
*/
struct db_context *db_open(TALLOC_CTX *mem_ctx,
const char *name,
int hash_size, int tdb_flags,
int open_flags, mode_t mode)
{
struct db_context *result = NULL;
#ifdef CLUSTER_SUPPORT
const char *sockname = lp_ctdbd_socket();
if(!sockname || !*sockname) {
sockname = CTDB_PATH;
}
if (lp_clustering()) {
const char *partname;
if (!socket_exist(sockname)) {
DEBUG(1, ("ctdb socket does not exist - is ctdb not "
"running?\n"));
return NULL;
}
/* ctdb only wants the file part of the name */
partname = strrchr(name, '/');
if (partname) {
partname++;
} else {
partname = name;
}
/* allow ctdb for individual databases to be disabled */
if (lp_parm_bool(-1, "ctdb", partname, True)) {
result = db_open_ctdb(mem_ctx, partname, hash_size,
tdb_flags, open_flags, mode);
if (result == NULL) {
DEBUG(0,("failed to attach to ctdb %s\n",
partname));
if (errno == 0) {
errno = EIO;
}
return NULL;
}
}
}
#endif
if (result == NULL) {
result = db_open_tdb(mem_ctx, name, hash_size,
tdb_flags, open_flags, mode);
}
if ((result != NULL) && (result->fetch == NULL)) {
result->fetch = dbwrap_fallback_fetch;
}
if ((result != NULL) && (result->parse_record == NULL)) {
result->parse_record = dbwrap_fallback_parse_record;
}
return result;
}
NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key)
{
struct db_record *rec;
NTSTATUS status;
rec = db->fetch_locked(db, talloc_tos(), key);
if (rec == NULL) {
return NT_STATUS_NO_MEMORY;
}
status = rec->delete_rec(rec);
TALLOC_FREE(rec);
return status;
}
NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
TDB_DATA data, int flags)
{
struct db_record *rec;
NTSTATUS status;
rec = db->fetch_locked(db, talloc_tos(), key);
if (rec == NULL) {
return NT_STATUS_NO_MEMORY;
}
status = rec->store(rec, data, flags);
TALLOC_FREE(rec);
return status;
}
TDB_DATA dbwrap_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
TDB_DATA key)
{
TDB_DATA result;
if (db->fetch(db, mem_ctx, key, &result) == -1) {
return make_tdb_data(NULL, 0);
}
return result;
}
NTSTATUS dbwrap_delete_bystring(struct db_context *db, const char *key)
{
return dbwrap_delete(db, string_term_tdb_data(key));
}
NTSTATUS dbwrap_store_bystring(struct db_context *db, const char *key,
TDB_DATA data, int flags)
{
return dbwrap_store(db, string_term_tdb_data(key), data, flags);
}
TDB_DATA dbwrap_fetch_bystring(struct db_context *db, TALLOC_CTX *mem_ctx,
const char *key)
{
return dbwrap_fetch(db, mem_ctx, string_term_tdb_data(key));
}
|
